BIOLOGY HOLIDAY HOMEWORK
CLASS-X
HOLIDAY HOMEWORK
• Complete the given assignment of ch-5(Life Processes).
• Complete Assignment for portfolio (Internal Assessment)
• Revise ch-5 (Life processes) and read from NCERT and Solve NCERT EXEMPLER of ch-5
• Complete Lab Manual (Experiment 1-4) as per given instructions in the class.
INSTRUCTIONS:
• Complete assignment in Separate assignment Notebook.
• Assignment for portfolio to be done on A4 size white sheets with pencil only.
ASSIGNMENT
Q1. Explain the following terms
a. Saprophytic nutrition
b. Holozoic nutrition
c. Peristalsis
d. Residual volume of air
e. Translocation
Q2. Give example of each.
a. Saprophytes
b. Parasites
c. Organism obtaining food by holozoic mode of nutrition
d. Autotrophs
e. Organism performing Anaerobic respiration
f. Substances absorbed in small intestine and reabsorbed in kidneys
g. Enzyme working in acidic medium
h. Animals showing single circulation of blood.
i. Animals who can tolerate some mixing of oxygenated and deoxygenated blood
j. Nitrogenous waste produced in the humans.
Q3. I. Give one word for
a. Finger like projections in the wall of intestine
b. Part where HCl is produced
c. Bio catalysts
d. Internal energy reserve of animals
e. The substances which are re-absorbed from the urine before passing into urinary bladder.
f. Blood vessel carrying deoxygenated blood to lungs
II. Fill in the blanks.
a. The exit of the food from the stomach is regulated by a —————- which releases it in small
amounts into the small intestine.
b. Salivary amylase breaks down————- which is a complex molecule to give—————
c. Grass eaters need a longer intestine to allow the ————- to be digested.
d. The food coming from the stomach into the intestine is—————and has to be made alkaline for
the———— enzyme to act.
e. Small intestine receives secretions of the————— and ————-.
f. In artificial kidney, the dialysing fluid has the same ———— pressure as blood.
Q4. Give reasons
a. Stomata in desert plants like cactus remain closed during the day.
b. Transpirational pull is the major driving force in the movement of water during day time.
c. Plants have low energy needs.
d. Bile juice does not contain an enzyme but it is essential for digestion.
e. Veins have thin walls as compared to arteries.
f. Nostrils are lined with mucus.
g. Chewing a piece of chapati in the mouth for a period of time makes it sweeter.
h. Valves are present between atria and ventricles.
Q5. Differentiate between pepsin and trypsin.
Q6. What will happen if the diaphragm of a person will get ruptured in an accident?
Q7. Name the respiratory pigment of blood. In which component is it present?
Q8. Write one feature which is common to each of the following
(A) Glycogen and Starch
(B) Chlorophyll and haemoglobin
(C) Gills and Lungs
Q9. Name the organisms having four chambered heart. What is the advantage of having four
chambered heart?
Q10.What is the role of potassium hydroxide in the experiment to prove that CO2 is essential for
photosynthesis.
Q11. What is the purpose of urine formation in body?
Q12. Why does absorption of digested food occur mainly in small intestine?
Q13. What are the roles of following in excretion-
a. Leaves b. Renal artery c. Bowman’s capsule
Q14. List two differences between holozoic nutrition and saprophytic nutrition.
Q15. The leaves of plant first prepare food by photosynthesis then food A gets converted into food B.
What are A and B?
Q16. What will happen if mucus is not secreted by gastric glands?
Q17. Why is Small intestine in herbivores longer than in carnivores.
Q18. List two factors on which reabsorption of water from urine depends?
Q19. Explain the mechanism of breathing in man.
Q20. Distinguish between breathing and respiration
Q21. Describe the flow of blood through the heart of human beings.
Q22. What are the common features between all the respiratory organs?
Q23. Leakage of blood from vessels reduces efficiency of pumping system. How is leakage
prevented?
Q24. Write one function of each of the following
a. Pepsin b. Villi c. Bile juice d. Saliva e. Hairs and mucus in the nasal passage
Q25. What is another name of Lymph? State its function.
Q26.Name two water conducting elements present in the plants. How water enter continuously into
root xylem?
Q27. Write one structural and one functional difference between artery and vein.
Q28. Mention the end products of digestion of food.
Q29. In which part of a nephron the following activity takes place?
i) Ultra filtration of blood ii) Reabsorption of Amino acids and glucose
Q30. State two vital functions of each heart and kidney.
PORTFOLIO QUESTIONS
1. Draw a diagram of human respiratory system and label the following:
A. Organ surrounded by cartilaginous rings
B. Structure where exchange of gases takes place
C. Voice box
D. Muscular structure that flattens during inhalation
E. Part where air is filtered by fine hair and mucus.
2. Draw a diagram of human excretory system and label the following:
A. Part in which urine is produced
B. Part that stores urine
C. Part that connects a and b
D. Blood vessel that brings blood for filtration
E. Part that removes urine out of the body.
3. Draw a sectional view of human heart and label the following
A. Part that divides heart into right and left side.
B. Part which prevents backflow of blood.
C. Chamber that receives deoxygenated blood from various parts of the body.
D. Chamber from where oxygenated blood is pumped out to various parts of the body.
E. Blood vessel that carries away oxygenated blood from heart.
4. Draw diagram of human alimentary canal and label the following:
A. Part in which starch digestion starts
B. Largest gland
C. Parts in which nutrients are absorbed
D. Organ In which bile is stored
E. Muscular organ that expands on receiving food.
5. Draw a well labelled diagram of:
a. Nephron
b. Neuron
c. Human Brain
